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Btrfs: make sure the chunk allocator doesn't create zero length chunks 

A recent commit allowed for smaller chunks to be created, but didn't
make sure they were always bigger than a stripe.  After some divides,
this led to zero length stripes.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
wifi-calibration
Chris Mason 2010-04-06 09:37:47 -04:00
parent ab6e24103c
commit 9f680ce04e
1 changed files with 6 additions and 0 deletions
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6
fs/btrfs/volumes.c
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@ -2249,6 +2249,12 @@ again:
if (!looped)
calc_size = max_t(u64, min_stripe_size, calc_size);
/*
* we're about to do_div by the stripe_len so lets make sure
* we end up with something bigger than a stripe
*/
calc_size = max_t(u64, calc_size, stripe_len * 4);
do_div(calc_size, stripe_len);
calc_size *= stripe_len;